Written by Daniel J. Bernstein (also known as djb), this simple hash function dates back to 1991. Hash functions have wide applications in computer science and in cryptography. They are used to map a potentially large amount of data to a number that represents it.

This is a list of hash functions, including cyclic redundancy checks, checksum functions, and cryptographic hash functions.

Sep 7, 2018 · If you have done any research into hashing functions, you have most likely heard of Daniel J. Bernstein’s hashing algorithm. It is often referred to as the most efficient and secure...

Jan 3, 2014 · The djb2 algorithm has a hash function for strings. unsigned long hash = 5381; int c; while (c = *str++) hash = ((hash << 5) + hash) + c; /* hash * 33 + c */ Why are 5381 and 33 so imp...

This algorithm (k=33) was first reported by dan bernstein many years ago in comp.lang.c. Another version of this algorithm (now favored by bernstein) uses xor: hash(i) = hash(i - 1) * 33 ^ str[i]; the magic of number 33 (why it works better than many other constants, prime or not) has never been adequately explained.

Compare Jenkins hash function and Bernstein's djb2 for performance, efficiency, and use cases. Discover which hash algorithm suits your needs best!

Bernstein's hash function, commonly referred to as djb2, is a simple yet effective hashing algorithm created by Daniel J. Bernstein in the mid-1990s. It employs a straightforward approach that combines the bitwise left shift operation and addition to generate hash values.

A simple yet effective hash function for strings is the well-known “djb2” algorithm by Daniel J. Bernstein. It is simple to implement and has good performance characteristics for many use cases. Here is the implementation of the djb2 hash function in C++: hash = ((hash << 5) + hash) + c; // hash * 33 + c } return hash; } .

It is a large-ish prime number, which are used as multiplers in most hash algorithms to spread out the values. I stumbled across a comment that sheds some light on what DJB is up to: * posted by him years ago on comp.lang.c. It basically uses a function. * like ``hash(i) = hash(i-1) * 33 + str[i]''. This is one of the best.

Nov 10, 2013 · I've tried to translate djb2 hash function from c-code unsigned long hash(unsigned char *str) { unsigned long hash = 5381; int c; while (c = *str++) hash = ((hash << 5) + hash) + c; /* hash * 33 + c */ return hash; }